Timoteo Aero-Flow Jock Strap Machine wash warm with like colors. Tumble dry on low heat. 80% Nylon / 20% Spandex Machine wash warm with like colors. Tumble dry on low heat. Small Waist: 28-30", Medium Waist: 32-34", Large Waist: 36-38", Extra Large Waist: 40-42"